Whistle Assembly Cord Retention Mechanism
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Solution Overview
Problem
Existing whistles with cords or straps often become disconnected due to insufficient retaining force, making them awkward to handle and store, and prone to unintentional removal with small forces.
Innovation Solution
A compact whistle assembly design featuring a cord insert with opposed cord-lock members and locking protuberances that securely clamp and engage the cord within a channel in the main body, providing a strong retaining force and preventing disconnection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a large collar or bulky structure is used to secure the cord to the whistle body, then the cord retention strength is improved, but the whistle becomes awkward to handle and store
Solution Approach 1:
The cord retention system is divided into separate functional components: a cord insert with locking mechanism and a cord-lock member. This segmentation allows each component to be optimized independently - the cord insert provides secure retention while the overall assembly remains compact and manageable, eliminating the need for bulky collars.
2Ease of operation
If a simple cord attachment structure is used, then the whistle is easier to handle and store, but the cord may become disconnected with sufficient force
Solution Approach 1:
The cord-lock member is pre-configured with engagement features that automatically secure the cord when the cord insert is inserted into the channel. This preliminary arrangement of locking components ensures reliable cord retention without requiring complex assembly or bulky structures, maintaining both convenience and reliability.
3Ease of operation
If a compact whistle design is used, then the whistle is easier to handle and store, but the cord retention structure may be insufficient
Solution Approach 1:
The cord retention system concentrates strengthening features at the critical local interface between the cord insert and cord-lock member. The locking studs and engagement features are positioned precisely where cord retention is needed, providing strong retention in a compact overall design without requiring bulk throughout the entire whistle structure.
Data Source
AI summary
A whistle assembly may include a main body, a cord insert, and a cord. The main body may include a mouth-receiving end connected to a cord end. A channel may be formed through at least a portion of the cord end. The cord insert may include a housing having a cord passage. The cord insert is retained within the channel of the main body. The cord has an end that is securely retained within the cord passage of the cord insert that is within the channel of the main body.